Preimpregnation device and OSP anti-oxidation line

Abstract

The utility model provides a preimpregnation device and an OSP antioxidation line, the preimpregnation device comprises a preimpregnation tank, a liquid storage tank, a circulating pump, a roller conveying assembly and a liquid receiving tank, the roller conveying assembly is movably arranged in the preimpregnation tank in a conveying manner, the circulating pump is used for supplying liquid medicine in the liquid storage tank into the preimpregnation tank, and the liquid receiving tank is provided with a water outlet pipe communicated with the liquid storage tank; the preimpregnation tank is arranged in the liquid receiving tank, the upper part of the preimpregnation tank is provided with an overflow port, the overflow port is communicated with the liquid receiving tank, the bottom of the preimpregnation tank is provided with a liquid inlet pipe, the liquid inlet pipe is communicated with the preimpregnation tank and the liquid storage tank, the circulating pump supplies liquid medicine in the liquid storage tank into the preimpregnation tank from the bottom through the liquid inlet pipe, and the liquid inlet of the preimpregnation tank is lower than the liquid level of the liquid medicine in the preimpregnation tank; according to the utility model, a spraying assembly is not needed, the circulating flow of the liquid medicine can be ensured, bubbles of the liquid medicine can be reduced, and the quality of the printed circuit board is improved.

Description

Technical Field

[0001] The utility model relates to the field of printed circuit board processing equipment, in particular to an impregnating device and an OSP antioxidant line. Background Art

[0002] OSP is a process that meets the requirements of the RoHS directive for the surface treatment of copper foils of printed circuit boards (PCBs). It is translated as organic solderability preservative film, also known as copper protector. Simply put, OSP is to grow an organic film on the clean bare copper surface by chemical means. This organic film has anti-oxidation, heat shock resistance, and moisture resistance, and is used to protect the copper surface from rusting, oxidation, sulfidation, etc. in the normal environment. The OSP antioxidant line generally includes processes such as micro-etching, impregnation, and immersion.

[0003] An existing PCB immersion device includes a conveying component, a liquid medicine tank, a liquid medicine cylinder, a roller conveying component, and a water knife component. The liquid medicine tank is communicated with the liquid medicine cylinder through a first overflow port. The liquid medicine cylinder is used to supply liquid medicine to the water knife component. The roller conveying component is used to convey the printed circuit board. The water knife component sprays the liquid medicine towards the printed circuit board from the upper and lower sides. The sprayed liquid medicine falls into the liquid medicine tank and returns to the liquid medicine cylinder through the first overflow port. The liquid medicine in the liquid medicine tank completely comes from the spraying of the water knife component, and the drainage of the liquid medicine tank depends on the first overflow port. During the working process, the liquid supply amount of the liquid medicine cylinder and the total overflow amount of the liquid medicine tank need to be basically equal. That is to say, during the working process, to keep the liquid medicine in the liquid medicine tank flowing, the water knife component needs to keep spraying. However, when the liquid medicine is sprayed, a large number of bubbles will be generated. The bubbles will be mixed in the liquid medicine, affecting the quality of the printed circuit board. Some liquid medicines with low bubble requirements are not suitable for spraying.

[0004] Therefore, there is an urgent need for an impregnating device that can ensure the circulation of the liquid medicine without spraying. Summary of the Utility Model

[0005] The first object of the utility model is to provide an impregnating device that can ensure the circulation of the liquid medicine without spraying.

[0006] The second object of the utility model is to provide an OSP antioxidant line including the above impregnating device.

[0007] To achieve the above first object, a pre-impregnation device provided by the present utility model includes a pre-impregnation tank, a liquid storage tank, a circulation pump, a roller conveying assembly, and a liquid receiving tank. The roller conveying assembly is movably arranged in the pre-impregnation tank for conveying. The circulation pump is used to supply the liquid medicine in the liquid storage tank into the pre-impregnation tank. The liquid receiving tank is provided with a water outlet pipe communicated with the liquid storage tank. The pre-impregnation tank is arranged in the liquid receiving tank. An overflow port is arranged at the upper part of the pre-impregnation tank and is communicated with the liquid receiving tank. A liquid inlet pipe is arranged at the bottom of the pre-impregnation tank, and the liquid inlet pipe communicates the pre-impregnation tank and the liquid storage tank. The circulation pump supplies the liquid medicine in the liquid storage tank into the pre-impregnation tank from the bottom through the liquid inlet pipe, and the liquid inlet of the pre-impregnation tank is lower than the liquid level of the liquid medicine in the pre-impregnation tank.

[0008] As can be seen from the above solution, by arranging a liquid inlet pipe at the bottom of the pre-impregnation tank and setting the liquid inlet of the pre-impregnation tank lower than the liquid level of the liquid medicine in the pre-impregnation tank, on the one hand, it is convenient for the liquid medicine in the liquid storage tank to enter the pre-impregnation tank. The liquid medicine in the pre-impregnation tank enters the liquid receiving tank through the overflow port and then flows back to the liquid storage tank, realizing the recycling of the liquid medicine. On the other hand, feeding the liquid from the bottom of the pre-impregnation tank can greatly reduce the generation of bubbles, which is beneficial to improving the quality of printed circuit boards.

[0009] A further solution is that the conveying surface of the roller conveying assembly is lower than the overflow port.

[0010] As can be seen from the above solution, through the above setting, it is ensured that the printed circuit board placed on the conveying surface can be fully contacted with the liquid medicine.

[0011] A further solution is that a plurality of overflow ports are arranged around the pre-impregnation tank, and each overflow port is communicated with the liquid receiving tank.

[0012] A further solution is that a liquid inlet installation pipe is arranged at the bottom of the pre-impregnation tank. The first end of the liquid inlet installation pipe is flush with the bottom wall of the pre-impregnation tank. The second end of the liquid inlet installation pipe penetrates downward through the pre-impregnation tank. The liquid inlet is arranged on the first end of the liquid inlet installation pipe and is flush with the bottom wall of the pre-impregnation tank. One end of the liquid inlet pipe is connected and communicated with the second end of the liquid inlet installation pipe.

[0013] A further solution is that a liquid inlet installation hole is opened on the bottom wall of the pre-impregnation tank. One end of the liquid inlet pipe is inserted into the liquid inlet installation hole. The liquid inlet is arranged at the end of the liquid inlet pipe, and the liquid inlet is flush with the bottom wall of the pre-impregnation tank, or the liquid inlet is higher than the bottom wall of the pre-impregnation tank.

[0014] A further solution is that the pre-impregnation device further includes a spraying assembly and a spraying pump. The spraying pump is used to supply the liquid medicine in the liquid storage tank to the spraying assembly. The spraying assembly is arranged on the upper side and / or the lower side of the roller conveying assembly, and the spraying port of the spraying assembly faces the roller conveying assembly.

[0015] As can be seen from the above solution, for some liquid medicines with low requirements for bubbles, through the above settings, the liquid medicine is sprayed onto the printed circuit board on the roller conveying component, so that the liquid medicine contacts the printed circuit board in a moving state, which is beneficial to the reaction between the liquid medicine and the printed circuit board and improves its quality.

[0016] A further solution is that the spraying component includes a spray pipe and a plurality of spray heads. The plurality of spray heads are arranged on the spray pipe. A reinforcing edge strip is arranged on the side of the spray pipe facing away from the spray heads, and the reinforcing edge strip extends along the extending direction of the spray pipe.

[0017] As can be seen from the above solution, through the above settings, it is beneficial to prevent the spray pipe from deforming.

[0018] In order to achieve the above second object, an OSP antioxidant line provided by the present utility model includes the above-mentioned pre-impregnation device.

[0019] A further solution is that the OSP antioxidant line further includes a first water washing device arranged at the rear end of the pre-impregnation device. The first water washing device includes a plurality of water washing units arranged in the conveying direction of the roller conveying component. Each water washing unit includes a water storage tank, a water spraying component and a water spraying pump. The water spraying component is arranged on the upper side and / or the lower side of the roller conveying component. The water spraying pump is used to supply water in the water storage tank to the water spraying component; the plurality of water storage tanks are arranged adjacent to each other. An overflow port is arranged between two adjacent water storage tanks, and the overflow direction of the plurality of water storage tanks is opposite to the conveying direction of the roller conveying component.

[0020] As can be seen from the above solution, through the above settings, it is beneficial to update the water for washing in the water storage tank, beneficial to ensuring the normal progress of water washing, and can also save water.

[0021] A further solution is that a water expelling air knife is arranged at the rear end of the first water washing device. The water expelling air knife is arranged on the upper side and / or the lower side of the roller conveying component, and the air outlet of the water expelling air knife faces the roller conveying component.

[0022] As can be seen from the above solution, through the above settings, it is beneficial to blow away the residual moisture on the printed circuit board and facilitate subsequent processing. Description of the Drawings

[0023] Figure 1 It is a structural diagram of the first perspective of the embodiment of the pre-impregnation device of the present utility model.

[0024] Figure 2 It is a structural diagram of the second perspective of the embodiment of the pre-impregnation device of the present utility model.

[0025] Figure 3 It is a structural diagram of the pre-impregnation tank and the water receiving tank in the embodiment of the pre-impregnation device of the present utility model.

[0026] Figure 4It is a structural diagram of the spray assembly in the embodiment of the impregnation device of the present utility model.

[0027] Figure 5 It is a structural diagram of the first perspective of the first water washing device in the embodiment of the OSP antioxidant line of the present utility model.

[0028] Figure 6 It is a structural diagram of the second perspective of the first water washing device in the embodiment of the OSP antioxidant line of the present utility model.

[0029] Figure 7 It is a structural diagram of the water expelling air knife and the roller conveying assembly in the embodiment of the OSP antioxidant line of the present utility model.

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0031] Embodiment of the impregnation device:

[0032] Refer to Figures 1 to 4 , a kind of impregnation device 10 provided in this embodiment includes a frame 1, an impregnation tank 2, a liquid receiving tank 3, a liquid storage tank 4, a circulation pump 5 and a roller conveying assembly 6. The impregnation tank 2 and the liquid receiving tank 3 are both arranged on the upper part of the frame 1, and the impregnation tank 2 is arranged in the liquid receiving tank 3; the liquid storage tank 4 is arranged on the lower part of the frame 1 and below the liquid receiving tank 3. The liquid receiving tank 3 is provided with a water outlet pipe 31 communicating with the liquid storage tank 4 for returning the liquid medicine to the liquid storage tank 4. The roller conveying assembly 6 is movably arranged in the impregnation tank 2 in a transportable manner. The frame 1 is respectively provided with a feeding port and a discharging port on its opposite sides, and both ends of the roller conveying assembly 6 extend towards the feeding port and the discharging port respectively.

[0033] The impregnation tank 2 is arranged in the liquid receiving tank 3, and an overflow port 21 is arranged on the upper part of the impregnation tank 2, and the overflow port 21 communicates with the liquid receiving tank 3. In this embodiment, both the impregnation tank 2 and the liquid receiving tank 3 are set as rectangles, and the side walls of the impregnation tank 2 and the side walls of the liquid receiving tank 3 are arranged in one-to-one correspondence. A plurality of overflow ports 21 are arranged on the side wall of the impregnation tank 2, and each overflow port 21 communicates with the liquid receiving tank 3, which is beneficial to ensuring that the total overflow amount of the impregnation tank 2 remains at a relatively large amount.

[0034] A liquid inlet pipe 22 is arranged at the bottom of the impregnation tank 2, and the liquid inlet pipe 22 communicates the impregnation tank 2 and the liquid storage tank 4. The circulation pump 5 supplies the liquid medicine in the liquid storage tank 4 into the impregnation tank 2 from the bottom through the liquid inlet pipe 22, and the liquid inlet of the impregnation tank 2 is lower than the liquid level of the liquid medicine in the impregnation tank 2, which is beneficial to reducing the generation of bubbles.

[0035] In one embodiment, a liquid inlet installation pipe is provided at the bottom of the impregnation tank 2. The upper end of the liquid inlet installation pipe is flush with the bottom wall of the impregnation tank 2, and the second end of the liquid inlet installation pipe penetrates downward outside the impregnation tank 2. The liquid inlet is provided at the upper end of the liquid inlet installation pipe and is flush with the bottom wall of the impregnation tank 2. One end of the liquid inlet pipe 22 is connected and communicated with the lower end of the liquid inlet installation pipe, so that the liquid medicine enters the impregnation tank 2 from the bottom of the impregnation tank 2, which is beneficial to reducing the generation of bubbles.

[0036] In another embodiment, a liquid inlet installation hole is penetratingly opened in the bottom wall of the impregnation tank 2. The upper end of the liquid inlet pipe 22 is inserted into the liquid inlet installation hole. The upper end of the liquid inlet pipe 22 can be flush with the bottom wall of the impregnation tank 2, or the upper end of the liquid inlet pipe 22 is slightly higher than the bottom wall of the impregnation tank 2 and lower than the liquid level of the liquid medicine in the impregnation tank 2. At this time, the liquid inlet of the impregnation tank 2 is provided at the upper end of the liquid inlet pipe 22, that is, the liquid inlet is flush with the bottom wall of the impregnation tank 2, or the liquid inlet is slightly higher than the bottom wall of the impregnation tank 2 and lower than the liquid level of the liquid medicine in the impregnation tank 2, so that the liquid medicine enters the impregnation tank 2 from the bottom of the impregnation tank 2, which is beneficial to reducing the generation of bubbles.

[0037] In order to ensure that the printed circuit board 30 placed on the roller conveying assembly 6 can be in full contact with the liquid medicine in the impregnation tank 2, the conveying surface of the roller conveying assembly 6 in this embodiment is slightly lower than the overflow port 21, so that the printed circuit board 30 placed on the conveying surface can be immersed in the liquid medicine.

[0038] The liquid medicine in this embodiment can enter the impregnation tank 2 through the liquid inlet pipe 22 at the bottom of the impregnation tank 2, then flow into the liquid receiving tank 3 through the overflow port 21, and then flow back to the liquid storage tank 4 through the water outlet pipe 31. The recycling of the liquid medicine can be realized without setting a spraying assembly 7; moreover, feeding liquid from the bottom of the impregnation tank 2 can effectively reduce the bubbles generated during liquid feeding, which is especially suitable for liquid medicine with low bubble requirements and is beneficial to improving the quality of the printed circuit board 30.

[0039] Combined with Figure 2 、 Figure 3 and Figure 4 , in order to improve the reaction effect between the liquid medicine and the printed circuit board 30, the impregnation device 10 in this embodiment further includes a spraying assembly 7 and a spraying pump 8. The spraying pump 8 is used to supply the liquid medicine in the liquid storage tank 4 to the spraying assembly 7. The spraying assembly 7 is arranged on the upper side and / or the lower side of the roller conveying assembly 6. Preferably, spraying assemblies 7 are arranged on both the upper side and the lower side of the roller conveying assembly 6, and the spraying ports of the spraying assemblies 7 are all directed towards the roller conveying assembly 6, and are used to spray the liquid medicine on the upper and lower sides of the printed circuit board 30 respectively, so that the liquid medicine in the impregnation tank 2 can flow, ensuring that the liquid medicine can fully react with the printed circuit board 30 and the reaction effect is better.

[0040] The spraying assembly 7 includes a spraying pipe 71 and a plurality of spray heads 72. The spraying pipe 71 is erected on both sides of the roller conveying assembly 6, and the plurality of spray heads 72 are arranged on the spraying pipe 71. A reinforcing edge strip 73 is provided on the side of the spraying pipe 71 facing away from the spray heads 72. The reinforcing edge strip 73 extends along the extending direction of the spraying pipe 71 to provide the structural strength of the spraying pipe 71 itself and avoid bending deformation. In this embodiment, the reinforcing edge strip 73 can be provided only on the upper spraying pipe 71, or the reinforcing edge strip 73 can be provided on both the upper spraying pipe 71 and the lower spraying pipe 71 at the same time. The spray heads 72 on the upper spraying pipe 71 and the spray heads 72 on the lower spraying pipe 71 can be arranged in a staggered manner or relatively arranged.

[0041] OSP antioxidant line embodiment:

[0042] See Figures 5 to 7 , and in combination with Figure 2 , this embodiment also provides an OSP antioxidant line, which sequentially includes a degreasing tank, a pickling tank, an alkali washing tank, a micro-etching device, a pre-dipping device 10 as in the above embodiment, a first water washing device 20, a first air drying device, an immersion device, a second water washing device, a second air drying device, and a drying device along the production and processing sequence. The roller conveying assembly 6 extends at least from the pre-dipping device 10 to the first water washing device 20. Preferably, the roller conveying assembly 6 extends all the way from the degreasing tank to the drying device along the production and processing sequence.

[0043] The first water washing device 20 includes a plurality of water washing units arranged along the conveying direction of the roller conveying assembly 6. In this embodiment, three water washing units are taken as an example. Each water washing unit includes a water storage tank 201, a water spraying assembly 202, and a water spraying pump 203. The water spraying assembly 202 is arranged on the upper side and / or the lower side of the roller conveying assembly 6. In this embodiment, the water spraying assembly 202 is preferably arranged on both the upper side and the lower side of the roller conveying assembly 6, and the water spraying ports of the water spraying assembly 202 face the roller conveying assembly 6; the water spraying pump 203 is used to supply the water in the water storage tank 201 to the water spraying assembly 202.

[0044] The three water storage tanks 201 are arranged adjacent to each other. An overflow port 2010 is arranged between two adjacent water storage tanks 201, and the heights of the two overflow ports 2010 gradually decrease along the reverse direction of the conveying direction, so that the overflow directions of the two water storage tanks 201 are opposite to the conveying direction of the roller conveying assembly 6, which is beneficial to recycling the relatively clean water washing water at the rear end back into the previous water storage tank 201 for recycling.

[0045] A water receiving tank is arranged below the water spraying assembly 202 of the water washing unit for receiving the water sprayed by the water spraying assembly 202. A water pipe is arranged at the bottom of the water receiving tank, and the water pipe is communicated with the corresponding water storage tank 201 for returning the water washing water to the water storage tank 201 for recycling.

[0046] In order to facilitate the subsequent rapid drying of the moisture on the printed circuit board 30 by the first drying device, in this embodiment, a plurality of water expelling air knives 204 are provided at the rear end of the water washing device. The water expelling air knives 204 are arranged on the upper side and / or the lower side of the roller conveying assembly 6. In this embodiment, preferably four water expelling air knives 204 are provided, and the four water expelling air knives 204 are respectively arranged on the upper and lower sides of the roller conveying assembly 6. In the vertical direction, the upper and lower water expelling air knives 204 are arranged opposite to each other, or the upper and lower water expelling air knives 204 are arranged in a staggered manner. Moreover, the air outlet of each water expelling air knife 204 faces the roller conveying assembly 6. The air outlet of the water expelling air knife 204 can be perpendicular to the conveying surface of the roller conveying assembly 6, or the air outlet of the water expelling air knife 204 can form a preset angle with the conveying surface of the roller conveying assembly 6. In this embodiment, the former is preferably adopted.

[0047] In summary, in the present utility model, by providing a liquid inlet pipe 22 at the bottom of the pre-impregnation tank 2 and setting the liquid inlet of the pre-impregnation tank 2 lower than the liquid level of the liquid medicine in the pre-impregnation tank 2, on the one hand, it is convenient for the liquid medicine in the liquid storage tank 4 to enter the pre-impregnation tank 2. The liquid medicine in the pre-impregnation tank 2 enters the liquid receiving tank 3 through the overflow port 21 and then flows back to the liquid storage tank 4, realizing the recycling of the liquid medicine. On the other hand, feeding the liquid from the bottom of the pre-impregnation tank 2 can greatly reduce the generation of bubbles, which is beneficial to improving the quality of the printed circuit board 30.

[0048] Finally, it should be emphasized that the above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pre-impregnation device, comprising a pre-impregnation tank, a liquid storage tank, a circulation pump and a roller conveying assembly. The roller conveying assembly is movably arranged in the pre-impregnation tank for conveying. The circulation pump is used to supply the liquid medicine in the liquid storage tank into the pre-impregnation tank, and is characterized in that: It further includes a liquid receiving tank, and a water outlet pipe communicating with the liquid storage tank is arranged on the liquid receiving tank; The pre-impregnation tank is arranged in the liquid receiving tank. An overflow port is arranged at the upper part of the pre-impregnation tank, and the overflow port communicates with the liquid receiving tank. A liquid inlet pipe is arranged at the bottom of the pre-impregnation tank, and the liquid inlet pipe communicates the pre-impregnation tank and the liquid storage tank. The circulating pump supplies the liquid medicine in the liquid storage tank into the pre-impregnation tank from the bottom through the liquid inlet pipe, and the liquid inlet of the pre-impregnation tank is lower than the liquid level of the liquid medicine in the pre-impregnation tank.

2. The pre-impregnation device according to claim 1, wherein: The conveying surface of the roller conveying assembly is lower than the overflow port.

3. The pre-impregnation device according to claim 1, wherein: A plurality of the overflow ports are arranged around the pre-impregnation tank, and each overflow port communicates with the liquid receiving tank.

4. The pre-impregnation device according to claim 1, wherein: A liquid inlet installation pipe is arranged at the bottom of the pre-impregnation tank. The first end of the liquid inlet installation pipe is flush with the bottom wall of the pre-impregnation tank. The second end of the liquid inlet installation pipe penetrates downward out of the pre-impregnation tank, and the liquid inlet is arranged on the first end of the liquid inlet installation pipe and is flush with the bottom wall of the pre-impregnation tank; One end of the liquid inlet pipe is connected and communicated with the second end of the liquid inlet installation pipe.

5. The pre-impregnation device according to claim 1, wherein: A liquid inlet installation hole is formed in the bottom wall of the pre-impregnation tank. One end of the liquid inlet pipe is inserted into the liquid inlet installation hole, and the liquid inlet is arranged at the end of the liquid inlet pipe. The liquid inlet is flush with the bottom wall of the pre-impregnation tank, or the liquid inlet is higher than the bottom wall of the pre-impregnation tank.

6. The pre-impregnation device according to claim 1, wherein: The pre-impregnation device further includes a spraying assembly and a spraying pump. The spraying pump is used to supply the liquid medicine in the liquid storage tank to the spraying assembly. The spraying assembly is arranged on the upper side and / or the lower side of the roller conveying assembly, and the spraying port of the spraying assembly faces the roller conveying assembly.

7. The pre-impregnation device according to claim 6, wherein: The spraying assembly includes a spraying pipe and a plurality of spray heads. The plurality of spray heads are arranged in a row on the spraying pipe. A reinforcing edge strip is arranged on the side of the spraying pipe facing away from the spray heads, and the reinforcing edge strip extends along the extending direction of the spraying pipe.

8. The OSP antioxidant line is characterized in that It includes the pre-impregnation device according to any one of claims 1 to 7 above.

9. The OSP antioxidant line according to claim 8, wherein: The OSP antioxidant line further includes a first water washing device arranged at the rear end of the pre-impregnation device. The first water washing device includes a plurality of water washing units arranged in a row along the conveying direction of the roller conveying assembly. Each water washing unit includes a water storage tank, a water spraying assembly and a water spraying pump. The water spraying assembly is arranged on the upper side and / or the lower side of the roller conveying assembly, and the water spraying pump is used to supply the water in the water storage tank to the water spraying assembly; The plurality of water storage tanks are arranged adjacent to each other. An overflow port is arranged between two adjacent water storage tanks, and the overflow directions of the plurality of water storage tanks are opposite to the conveying direction of the roller conveying assembly.

10. The OSP antioxidant line according to claim 9, characterized in that: A water expelling air knife is provided at the rear end of the first water washing device, and the water expelling air knife is arranged on the upper side and / or the lower side of the roller conveying assembly, and the air outlet of the water expelling air knife faces the roller conveying assembly.

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